Dust to Dust is a wonderful sequel to Ashes to Ashes. It is not necessary to read Ashes to Ashes, though, as Carl does a fine job about giving the reader a little bit of background if they are not familiar with the story.
Rebecca and Michael are in that interesting stage of a relationship where they are serious enough to have to determine if what they have is worth taking to the next level or if they should just give up on the whole thing. It was also wonderful to have a dig in Scotland as the backdrop. I particularly enjoyed learning about Scottish history and the archaeological aspects were fascinating. The book is a wonderful read and I highly recommend it to anyone who enjoys romantic mysteries!